Piwik Email Reports Page Issue (1 reply)

First of all, I'm new to Piwik community. This is the first time I used Piwik on my website. I'm having issue with Piwik email reports sections.
When I open the Email Reports section, I got a JS error message

Quote
Uncaught TypeError: Object #<Object> has no method 'initSiteSelectors'

That error message caused by these line of codes:

<script type="text/javascript">
	$(document).ready(function() { piwik.initSiteSelectors(); });
</script>

Some function on Email Reports section not working well. When I click on 'Create and Schedule a report' or 'Edit' or 'Delete', nothing's happened.

And also I've not receive any weekly reports. It's working fine a couple weeks ago.

I'm using Piwik 1.11.1

Any idea?

Thanks
Julian